Answer this question truthfully
### Question: What causes cerebral venous sinus thrombosis?
### Response: - multiple pregnancies,
- untreated inflammatory conditions
- infections and injuries of the central nervous system
- venous thromboembolism,
- pregnancy
- oestrogen therapy/ oral contraceptives,
- thrombophilia (especially antithrombin deficiency, protein C and S deficiency and factor V Leiden mutation),
- hypercoagulability
- head trauma,
- local infections
- underlying cancer